Combined carpenter&#39;s square and miter-gage.



C. F. BENJAMIN.

COMBINED CARPENTERS SQUARE AND MITER GAGE. APPLICATION FILED DEC. I2,1914.

Patented Nov. 2, 1915.

wanes Aw CLARENCE ERAN LINEENJAMIN, or MILFORD, CONNECTICUT.

COMBINED CARPENTERSS SQUARE AND MITER-GAG'E.

Specification of Letters Patent.

Patented Nov. 2, 1915.

, Application filed December 12, 1914. Serial No. 876,867.

To all whom it may concern. Be it known that I, CLARENCE F. BENJA- MIN,a citizen of the Jnited States, residing at the'town of Milford, countyofNew Haven, and State of Connecticut, have in vented certam new anduseful Improvements in Combined Carpenters Squares and Miter-Gages; andI do declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which itappertains to make and use thesame. a

This invention relates to certain new and useful improvements in rules,and pertains more particularly to pivoted rules of the folding or pockettype.

The primary object of the invention is to provide a rule which has noveland improved means incorporated therein for holding the two pivotedsections of the rule locked in any desiredangular relation, so as topermit the rule to be used in cutting miters, beveling, and in otherinstances where an angle is to be marked or formed.

A further object of the invention is to provide means whereby the twopivoted sections of the rule may be given micrometric adjustments afterinitial locking in their desired angular relationship.

Further and other objects will later appear and be set forth.

In the drawings: Figure 1 is a fragmentary plan view of the invention;Fig. 2 is a fragmentary sectional view showing the pivoted rule memberslocked at right angles; and Fig. 3 is a sectional view on the line 3-3of Fig. 2.

Specifically the invention involves two members 1 and 2 of aconventional type of rule, the member 1 being provided with a circularhead 3 which has a central opening 4, and a plurality of notches 5 onits periphery.

The member 2 has secured on opposite sides thereof spaced plates 6 eachof which is provided with an opening 7. The plates 6 embrace thecircular head 3, and their openings 7 register with the opening 4 in thehead 3, a pin 8 being passed through the openings 1 and 7 to pivotallyconnect the two members 1 and 2.

Themember 2 is recessed as shown at 10 and slidably receives a block 11in the recess, the side edges 12 of the block projecting into slots 12in the plates 6. The block 11 is provided with a pair of screw-threadedapertures 13 for the reception of screws 14, which latter secure adetent 15 to the block 11. The screws 14: pass through slots '16 in thedetent 15, the slots being of greater width than the diameters of thescrews. i t

The detent 15 is ieceivable in the space between the plates 6.,land bybeing secured to the block prevents'displacement of the latter from therecess 10, as is apparent from Fig. 3 of the drawings. i a

The inner or bottom edge of the detent 15 is curved at the ends thereofat 20, and its forward end is provided with a nose 21 which is adaptedto fit into a selected one of the notches 5 in the circular member Byvirtue of the curved ends of the detent 15 contacting with the adjacentstraight face of the block 11, it will be seen that the detent 15 iscapable of a rocking movement with respect thereto for a purpose now tobe described.

When it is desired to set the two members 1 and 2 at an angle to eachother, the same are turned about their pivotal connection 8 until thenose 21 of theblock 15 is opposite the desired notch 5 in the member 3.The blocks are then moved forwardly until the nose 21 is engaged in thenotch 5 thus preventing relative pivotal movement of the members 1 and2.

To provide for a more accurate adjustment of the members 1 and 2, one ofthe screws 14 is turned outwardly and the other inwardly, which effectsa rocking movement of the detent 15 with respect to the block 11 thusgiving the necessary movement to the members 1 and 2 to obtain anaccurate or micrometric adjustment. When this adjustment has been madethe screws 14- are tightened and the members 1 and 2 are thus heldrigidly in their adjusted position. The lastnamed adjustment enables themembers 1 and 2 to contract or spread apart as de sired, according towhether the members are to be contracted or spread apart, after thesliding lock is moved into one of the notches 5.

What is claimed is:

1. In a rule, a pair of pivoted members, a notched circular head carriedby one of the members, a device carried by and slidable and tiltablewith reference to the other memberfor engagement with the notches of thecircular member, and means for tilting said device after such engagementfor correctmg angular varlatlons of sald members.

' 2. In a rulefa pair ofpivotedmemberaa notched member carried by one ofthe piv- .oted members, a sliding block carried by the opposite pivotedmember, a device carried by and slidable and tiltable With reference tosaid block for engagemeh'tvvith'one'of the" notches of the notchedmember to secure the members, a sliding block carried by theother"member, means 'ea'rri'edby theblockTdren gagement Wi th one of thenotches to. idol? 2 O the" pivoted members in angfi1ai"'re1atidn,

andmeansfdr adj "s ting thenotch engaging means relatively to saidblock.

r 4;. In a rule, a pair of pivoted members,

one ofthe notches of the notched-member I to lock the pivoted members inangular relation, said notch engaging means having a curved edge forengagement With theblock to provide for its' adjiistment relatively"Copies of this patentma'y' be obta'irfed for cents 'eaeh, by addressingthe eemmissi'bnerwr Patents}. i

. N Washington, DZC.

